<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Bootstrap</title>
    <link rel="stylesheet" href="bootstrap.css">
</head>
<body>
<div class="container">
    <h1>H1标题</h1>
    <h2>H2标题</h2>
    <h3>H3标题</h3>
    <h4>H4标题 <small>small副标题</small></h4>
    <p>p标签p标签p标签p标签p标签p标签</p>
    <p class="lead">lead突出显示的 p标签p标签p标签p标签p标签p标签</p>
    <p>Hello World!欢迎来到
        <mark>mark标记 极客学院</mark>
    </p>
</div>
</body>
</html>